(a) Graph the function f(x) = 1 / (1 + e1/x).
(b) Explain the shape of the graph by computing the limits of f(x) as approaches ∞, – ∞, 0+, and 0–.
(c) Use the graph of f to estimate the coordinates of the inflection points.
(d) Use your CAS to compute and graph f”.
(e) Use the graph in part (d) to estimate the inflection points more accurately